Answered: OpenWRT + OpenVPN with PP IPv6

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0x1378247

New Member
Hello Everybody,

I am actually having problems with the IPv6 Protocol.

I have an working OpenWRT router with only IPv4 and the VPN Tunnel now I am interested in activate the IPv6 support. The tun0 interface gets an IPv6 Addressblock from PP, the client gets an IPv6 Adress from the DHCPv6 Server and when I do ping -6 the DNS gets resolved to an IPv6 Adress but the ping is not sent. I have added traffic rules for allowing all ipv6 output traffic from LAN to VPN but nothing helped.

Does someone have an working OpenWRT with IPv4 / IPv6 over PP VPN Tunnel? I only get IPv4 to work :/

Additionally my ISP has no IPv6 Support!!!
 
Solution
MixMaster
0x1378247 said:
The tun0 interface gets an IPv6 Addressblock from PP, the client gets an IPv6 Adress from the DHCPv6 Server and when I do ping -6 the DNS gets resolved to an IPv6 Adress but the ping is not sent. I have added traffic rules for allowing all ipv6 output traffic from LAN to VPN but nothing helped.
Click to expand...

Your tun0 device receives a single address, not an address block. You need to NAT your LAN address range to this address, same as for IPv4. Something likes this should work:

ip6tables -A POSTROUTING -t nat -o tun0 -j MASQUERADE
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0x1378247 said:
The tun0 interface gets an IPv6 Addressblock from PP, the client gets an IPv6 Adress from the DHCPv6 Server and when I do ping -6 the DNS gets resolved to an IPv6 Adress but the ping is not sent. I have added traffic rules for allowing all ipv6 output traffic from LAN to VPN but nothing helped.
Click to expand...

Your tun0 device receives a single address, not an address block. You need to NAT your LAN address range to this address, same as for IPv4. Something likes this should work:

ip6tables -A POSTROUTING -t nat -o tun0 -j MASQUERADE
 
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